code: def run(self) -> None:
      print("Hello World!!!")
  
file_path: launchpad/launchpad/launch/xm_docker/launch_test.py
imports: import os
  from absl.testing import absltest
  import launchpad
  from launchpad.nodes.python import xm_docker
label_desc: Use image node_id 2 for calling the HelloWorld obj's underlying member method code with example usage: obj.run() without return types